451 lines
16 KiB
Makefile
451 lines
16 KiB
Makefile
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# SPDX-License-Identifier: GPL-2.0
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BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src))
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TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools
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pound := \#
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# List of programs to build
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tprogs-y := test_lru_dist
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tprogs-y += sock_example
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tprogs-y += fds_example
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tprogs-y += sockex1
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tprogs-y += sockex2
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tprogs-y += sockex3
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tprogs-y += tracex1
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tprogs-y += tracex2
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tprogs-y += tracex3
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tprogs-y += tracex4
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tprogs-y += tracex5
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tprogs-y += tracex6
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tprogs-y += tracex7
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tprogs-y += test_probe_write_user
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tprogs-y += trace_output
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tprogs-y += lathist
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tprogs-y += offwaketime
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tprogs-y += spintest
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tprogs-y += map_perf_test
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tprogs-y += test_overhead
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tprogs-y += test_cgrp2_array_pin
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tprogs-y += test_cgrp2_attach
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tprogs-y += test_cgrp2_sock
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tprogs-y += test_cgrp2_sock2
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tprogs-y += xdp1
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tprogs-y += xdp2
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tprogs-y += xdp_router_ipv4
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tprogs-y += test_current_task_under_cgroup
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tprogs-y += trace_event
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tprogs-y += sampleip
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tprogs-y += tc_l2_redirect
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tprogs-y += lwt_len_hist
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tprogs-y += xdp_tx_iptunnel
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tprogs-y += test_map_in_map
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tprogs-y += per_socket_stats_example
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tprogs-y += xdp_rxq_info
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tprogs-y += syscall_tp
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tprogs-y += cpustat
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tprogs-y += xdp_adjust_tail
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tprogs-y += xdp_fwd
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tprogs-y += task_fd_query
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tprogs-y += xdp_sample_pkts
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tprogs-y += ibumad
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tprogs-y += hbm
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tprogs-y += xdp_redirect_cpu
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tprogs-y += xdp_redirect_map_multi
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tprogs-y += xdp_redirect_map
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tprogs-y += xdp_redirect
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tprogs-y += xdp_monitor
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# Libbpf dependencies
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LIBBPF_SRC = $(TOOLS_PATH)/lib/bpf
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LIBBPF_OUTPUT = $(abspath $(BPF_SAMPLES_PATH))/libbpf
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LIBBPF_DESTDIR = $(LIBBPF_OUTPUT)
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LIBBPF_INCLUDE = $(LIBBPF_DESTDIR)/include
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LIBBPF = $(LIBBPF_OUTPUT)/libbpf.a
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CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
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TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o
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XDP_SAMPLE := xdp_sample_user.o
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fds_example-objs := fds_example.o
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sockex1-objs := sockex1_user.o
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sockex2-objs := sockex2_user.o
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sockex3-objs := sockex3_user.o
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tracex1-objs := tracex1_user.o $(TRACE_HELPERS)
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tracex2-objs := tracex2_user.o
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tracex3-objs := tracex3_user.o
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tracex4-objs := tracex4_user.o
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tracex5-objs := tracex5_user.o $(TRACE_HELPERS)
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tracex6-objs := tracex6_user.o
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tracex7-objs := tracex7_user.o
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test_probe_write_user-objs := test_probe_write_user_user.o
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trace_output-objs := trace_output_user.o
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lathist-objs := lathist_user.o
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offwaketime-objs := offwaketime_user.o $(TRACE_HELPERS)
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spintest-objs := spintest_user.o $(TRACE_HELPERS)
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map_perf_test-objs := map_perf_test_user.o
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test_overhead-objs := test_overhead_user.o
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test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o
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test_cgrp2_attach-objs := test_cgrp2_attach.o
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test_cgrp2_sock-objs := test_cgrp2_sock.o
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test_cgrp2_sock2-objs := test_cgrp2_sock2.o
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xdp1-objs := xdp1_user.o
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# reuse xdp1 source intentionally
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xdp2-objs := xdp1_user.o
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test_current_task_under_cgroup-objs := $(CGROUP_HELPERS) \
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test_current_task_under_cgroup_user.o
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trace_event-objs := trace_event_user.o $(TRACE_HELPERS)
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sampleip-objs := sampleip_user.o $(TRACE_HELPERS)
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tc_l2_redirect-objs := tc_l2_redirect_user.o
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lwt_len_hist-objs := lwt_len_hist_user.o
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xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o
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test_map_in_map-objs := test_map_in_map_user.o
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per_socket_stats_example-objs := cookie_uid_helper_example.o
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xdp_rxq_info-objs := xdp_rxq_info_user.o
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syscall_tp-objs := syscall_tp_user.o
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cpustat-objs := cpustat_user.o
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xdp_adjust_tail-objs := xdp_adjust_tail_user.o
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xdp_fwd-objs := xdp_fwd_user.o
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task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS)
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xdp_sample_pkts-objs := xdp_sample_pkts_user.o
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ibumad-objs := ibumad_user.o
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hbm-objs := hbm.o $(CGROUP_HELPERS)
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xdp_redirect_map_multi-objs := xdp_redirect_map_multi_user.o $(XDP_SAMPLE)
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xdp_redirect_cpu-objs := xdp_redirect_cpu_user.o $(XDP_SAMPLE)
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xdp_redirect_map-objs := xdp_redirect_map_user.o $(XDP_SAMPLE)
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xdp_redirect-objs := xdp_redirect_user.o $(XDP_SAMPLE)
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xdp_monitor-objs := xdp_monitor_user.o $(XDP_SAMPLE)
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xdp_router_ipv4-objs := xdp_router_ipv4_user.o $(XDP_SAMPLE)
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# Tell kbuild to always build the programs
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always-y := $(tprogs-y)
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always-y += sockex1_kern.o
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always-y += sockex2_kern.o
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always-y += sockex3_kern.o
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always-y += tracex1_kern.o
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always-y += tracex2.bpf.o
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always-y += tracex3_kern.o
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always-y += tracex4_kern.o
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always-y += tracex5_kern.o
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always-y += tracex6_kern.o
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always-y += tracex7_kern.o
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always-y += sock_flags.bpf.o
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always-y += test_probe_write_user.bpf.o
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always-y += trace_output.bpf.o
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always-y += tcbpf1_kern.o
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always-y += tc_l2_redirect_kern.o
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always-y += lathist_kern.o
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always-y += offwaketime_kern.o
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always-y += spintest_kern.o
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always-y += map_perf_test.bpf.o
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always-y += test_overhead_tp.bpf.o
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always-y += test_overhead_raw_tp.bpf.o
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always-y += test_overhead_kprobe.bpf.o
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always-y += parse_varlen.o parse_simple.o parse_ldabs.o
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always-y += test_cgrp2_tc.bpf.o
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always-y += xdp1_kern.o
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always-y += xdp2_kern.o
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always-y += test_current_task_under_cgroup.bpf.o
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always-y += trace_event_kern.o
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always-y += sampleip_kern.o
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always-y += lwt_len_hist.bpf.o
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always-y += xdp_tx_iptunnel_kern.o
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always-y += test_map_in_map.bpf.o
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always-y += tcp_synrto_kern.o
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always-y += tcp_rwnd_kern.o
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always-y += tcp_bufs_kern.o
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always-y += tcp_cong_kern.o
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always-y += tcp_iw_kern.o
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always-y += tcp_clamp_kern.o
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always-y += tcp_basertt_kern.o
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always-y += tcp_tos_reflect_kern.o
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always-y += tcp_dumpstats_kern.o
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always-y += xdp_rxq_info_kern.o
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always-y += xdp2skb_meta_kern.o
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always-y += syscall_tp_kern.o
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always-y += cpustat_kern.o
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always-y += xdp_adjust_tail_kern.o
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always-y += xdp_fwd_kern.o
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always-y += task_fd_query_kern.o
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always-y += xdp_sample_pkts_kern.o
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always-y += ibumad_kern.o
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always-y += hbm_out_kern.o
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always-y += hbm_edt_kern.o
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ifeq ($(ARCH), arm)
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# Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux
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# headers when arm instruction set identification is requested.
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ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS))
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BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR)
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TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR)
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endif
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ifeq ($(ARCH), mips)
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TPROGS_CFLAGS += -D__SANE_USERSPACE_TYPES__
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ifdef CONFIG_MACH_LOONGSON64
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BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-loongson64
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BPF_EXTRA_CFLAGS += -I$(srctree)/arch/mips/include/asm/mach-generic
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endif
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endif
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TPROGS_CFLAGS += -Wall -O2
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TPROGS_CFLAGS += -Wmissing-prototypes
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TPROGS_CFLAGS += -Wstrict-prototypes
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TPROGS_CFLAGS += -I$(objtree)/usr/include
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TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
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TPROGS_CFLAGS += -I$(LIBBPF_INCLUDE)
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TPROGS_CFLAGS += -I$(srctree)/tools/include
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TPROGS_CFLAGS += -I$(srctree)/tools/perf
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TPROGS_CFLAGS += -DHAVE_ATTR_TEST=0
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ifdef SYSROOT
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TPROGS_CFLAGS += --sysroot=$(SYSROOT)
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TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib
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endif
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TPROGS_LDLIBS += $(LIBBPF) -lelf -lz
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TPROGLDLIBS_xdp_monitor += -lm
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TPROGLDLIBS_xdp_redirect += -lm
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TPROGLDLIBS_xdp_redirect_cpu += -lm
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TPROGLDLIBS_xdp_redirect_map += -lm
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TPROGLDLIBS_xdp_redirect_map_multi += -lm
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TPROGLDLIBS_xdp_router_ipv4 += -lm -pthread
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TPROGLDLIBS_tracex4 += -lrt
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TPROGLDLIBS_trace_output += -lrt
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TPROGLDLIBS_map_perf_test += -lrt
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TPROGLDLIBS_test_overhead += -lrt
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# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
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# make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang
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LLC ?= llc
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CLANG ?= clang
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OPT ?= opt
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LLVM_DIS ?= llvm-dis
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LLVM_OBJCOPY ?= llvm-objcopy
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LLVM_READELF ?= llvm-readelf
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BTF_PAHOLE ?= pahole
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# Detect that we're cross compiling and use the cross compiler
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ifdef CROSS_COMPILE
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CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%))
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endif
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# Don't evaluate probes and warnings if we need to run make recursively
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ifneq ($(src),)
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HDR_PROBE := $(shell printf "$(pound)include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \
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$(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \
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-o /dev/null 2>/dev/null && echo okay)
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ifeq ($(HDR_PROBE),)
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$(warning WARNING: Detected possible issues with include path.)
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$(warning WARNING: Please install kernel headers locally (make headers_install).)
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endif
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BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
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BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
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BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
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BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
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$(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
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$(LLVM_READELF) -S ./llvm_btf_verify.o | grep BTF; \
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/bin/rm -f ./llvm_btf_verify.o)
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BPF_EXTRA_CFLAGS += -fno-stack-protector
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ifneq ($(BTF_LLVM_PROBE),)
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BPF_EXTRA_CFLAGS += -g
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else
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ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
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BPF_EXTRA_CFLAGS += -g
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LLC_FLAGS += -mattr=dwarfris
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DWARF2BTF = y
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endif
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endif
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endif
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# Trick to allow make to be run from this directory
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all:
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$(MAKE) -C ../../ M=$(CURDIR) BPF_SAMPLES_PATH=$(CURDIR)
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clean:
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$(MAKE) -C ../../ M=$(CURDIR) clean
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@find $(CURDIR) -type f -name '*~' -delete
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@$(RM) -r $(CURDIR)/libbpf $(CURDIR)/bpftool
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$(LIBBPF): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT)
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# Fix up variables inherited from Kbuild that tools/ build system won't like
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$(MAKE) -C $(LIBBPF_SRC) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \
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LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ \
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O= OUTPUT=$(LIBBPF_OUTPUT)/ DESTDIR=$(LIBBPF_DESTDIR) prefix= \
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$@ install_headers
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BPFTOOLDIR := $(TOOLS_PATH)/bpf/bpftool
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BPFTOOL_OUTPUT := $(abspath $(BPF_SAMPLES_PATH))/bpftool
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BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool
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$(BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) | $(BPFTOOL_OUTPUT)
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$(MAKE) -C $(BPFTOOLDIR) srctree=$(BPF_SAMPLES_PATH)/../../ \
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OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap
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$(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT):
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$(call msg,MKDIR,$@)
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$(Q)mkdir -p $@
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$(obj)/syscall_nrs.h: $(obj)/syscall_nrs.s FORCE
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$(call filechk,offsets,__SYSCALL_NRS_H__)
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targets += syscall_nrs.s
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clean-files += syscall_nrs.h
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FORCE:
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# Verify LLVM compiler tools are available and bpf target is supported by llc
|
||
|
|
.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
|
||
|
|
|
||
|
|
verify_cmds: $(CLANG) $(LLC)
|
||
|
|
@for TOOL in $^ ; do \
|
||
|
|
if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
|
||
|
|
echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
|
||
|
|
exit 1; \
|
||
|
|
else true; fi; \
|
||
|
|
done
|
||
|
|
|
||
|
|
verify_target_bpf: verify_cmds
|
||
|
|
@if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
|
||
|
|
echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
|
||
|
|
echo " NOTICE: LLVM version >= 3.7.1 required" ;\
|
||
|
|
exit 2; \
|
||
|
|
else true; fi
|
||
|
|
|
||
|
|
$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
|
||
|
|
$(src)/*.c: verify_target_bpf $(LIBBPF)
|
||
|
|
|
||
|
|
libbpf_hdrs: $(LIBBPF)
|
||
|
|
$(obj)/$(TRACE_HELPERS) $(obj)/$(CGROUP_HELPERS) $(obj)/$(XDP_SAMPLE): | libbpf_hdrs
|
||
|
|
|
||
|
|
.PHONY: libbpf_hdrs
|
||
|
|
|
||
|
|
$(obj)/xdp_redirect_cpu_user.o: $(obj)/xdp_redirect_cpu.skel.h
|
||
|
|
$(obj)/xdp_redirect_map_multi_user.o: $(obj)/xdp_redirect_map_multi.skel.h
|
||
|
|
$(obj)/xdp_redirect_map_user.o: $(obj)/xdp_redirect_map.skel.h
|
||
|
|
$(obj)/xdp_redirect_user.o: $(obj)/xdp_redirect.skel.h
|
||
|
|
$(obj)/xdp_monitor_user.o: $(obj)/xdp_monitor.skel.h
|
||
|
|
$(obj)/xdp_router_ipv4_user.o: $(obj)/xdp_router_ipv4.skel.h
|
||
|
|
|
||
|
|
$(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h
|
||
|
|
$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
|
||
|
|
$(obj)/hbm.o: $(src)/hbm.h
|
||
|
|
$(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
|
||
|
|
|
||
|
|
# Override includes for xdp_sample_user.o because $(srctree)/usr/include in
|
||
|
|
# TPROGS_CFLAGS causes conflicts
|
||
|
|
XDP_SAMPLE_CFLAGS += -Wall -O2 \
|
||
|
|
-I$(src)/../../tools/include \
|
||
|
|
-I$(src)/../../tools/include/uapi \
|
||
|
|
-I$(LIBBPF_INCLUDE) \
|
||
|
|
-I$(src)/../../tools/testing/selftests/bpf
|
||
|
|
|
||
|
|
$(obj)/$(XDP_SAMPLE): TPROGS_CFLAGS = $(XDP_SAMPLE_CFLAGS)
|
||
|
|
$(obj)/$(XDP_SAMPLE): $(src)/xdp_sample_user.h $(src)/xdp_sample_shared.h
|
||
|
|
|
||
|
|
-include $(BPF_SAMPLES_PATH)/Makefile.target
|
||
|
|
|
||
|
|
VMLINUX_BTF_PATHS ?= $(abspath $(if $(O),$(O)/vmlinux)) \
|
||
|
|
$(abspath $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)) \
|
||
|
|
$(abspath ./vmlinux)
|
||
|
|
VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
|
||
|
|
|
||
|
|
$(obj)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL)
|
||
|
|
ifeq ($(VMLINUX_H),)
|
||
|
|
ifeq ($(VMLINUX_BTF),)
|
||
|
|
$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)",\
|
||
|
|
build the kernel or set VMLINUX_BTF or VMLINUX_H variable)
|
||
|
|
endif
|
||
|
|
$(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
|
||
|
|
else
|
||
|
|
$(Q)cp "$(VMLINUX_H)" $@
|
||
|
|
endif
|
||
|
|
|
||
|
|
clean-files += vmlinux.h
|
||
|
|
|
||
|
|
# Get Clang's default includes on this system, as opposed to those seen by
|
||
|
|
# '-target bpf'. This fixes "missing" files on some architectures/distros,
|
||
|
|
# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
|
||
|
|
#
|
||
|
|
# Use '-idirafter': Don't interfere with include mechanics except where the
|
||
|
|
# build would have failed anyways.
|
||
|
|
define get_sys_includes
|
||
|
|
$(shell $(1) -v -E - </dev/null 2>&1 \
|
||
|
|
| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
|
||
|
|
$(shell $(1) -dM -E - </dev/null | grep '#define __riscv_xlen ' | sed 's/#define /-D/' | sed 's/ /=/')
|
||
|
|
endef
|
||
|
|
|
||
|
|
CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
|
||
|
|
|
||
|
|
$(obj)/xdp_redirect_cpu.bpf.o: $(obj)/xdp_sample.bpf.o
|
||
|
|
$(obj)/xdp_redirect_map_multi.bpf.o: $(obj)/xdp_sample.bpf.o
|
||
|
|
$(obj)/xdp_redirect_map.bpf.o: $(obj)/xdp_sample.bpf.o
|
||
|
|
$(obj)/xdp_redirect.bpf.o: $(obj)/xdp_sample.bpf.o
|
||
|
|
$(obj)/xdp_monitor.bpf.o: $(obj)/xdp_sample.bpf.o
|
||
|
|
$(obj)/xdp_router_ipv4.bpf.o: $(obj)/xdp_sample.bpf.o
|
||
|
|
|
||
|
|
$(obj)/%.bpf.o: $(src)/%.bpf.c $(obj)/vmlinux.h $(src)/xdp_sample.bpf.h $(src)/xdp_sample_shared.h
|
||
|
|
@echo " CLANG-BPF " $@
|
||
|
|
$(Q)$(CLANG) -g -O2 -target bpf -D__TARGET_ARCH_$(SRCARCH) \
|
||
|
|
-Wno-compare-distinct-pointer-types -I$(srctree)/include \
|
||
|
|
-I$(srctree)/samples/bpf -I$(srctree)/tools/include \
|
||
|
|
-I$(LIBBPF_INCLUDE) $(CLANG_SYS_INCLUDES) \
|
||
|
|
-c $(filter %.bpf.c,$^) -o $@
|
||
|
|
|
||
|
|
LINKED_SKELS := xdp_redirect_cpu.skel.h xdp_redirect_map_multi.skel.h \
|
||
|
|
xdp_redirect_map.skel.h xdp_redirect.skel.h xdp_monitor.skel.h \
|
||
|
|
xdp_router_ipv4.skel.h
|
||
|
|
clean-files += $(LINKED_SKELS)
|
||
|
|
|
||
|
|
xdp_redirect_cpu.skel.h-deps := xdp_redirect_cpu.bpf.o xdp_sample.bpf.o
|
||
|
|
xdp_redirect_map_multi.skel.h-deps := xdp_redirect_map_multi.bpf.o xdp_sample.bpf.o
|
||
|
|
xdp_redirect_map.skel.h-deps := xdp_redirect_map.bpf.o xdp_sample.bpf.o
|
||
|
|
xdp_redirect.skel.h-deps := xdp_redirect.bpf.o xdp_sample.bpf.o
|
||
|
|
xdp_monitor.skel.h-deps := xdp_monitor.bpf.o xdp_sample.bpf.o
|
||
|
|
xdp_router_ipv4.skel.h-deps := xdp_router_ipv4.bpf.o xdp_sample.bpf.o
|
||
|
|
|
||
|
|
LINKED_BPF_SRCS := $(patsubst %.bpf.o,%.bpf.c,$(foreach skel,$(LINKED_SKELS),$($(skel)-deps)))
|
||
|
|
|
||
|
|
BPF_SRCS_LINKED := $(notdir $(wildcard $(src)/*.bpf.c))
|
||
|
|
BPF_OBJS_LINKED := $(patsubst %.bpf.c,$(obj)/%.bpf.o, $(BPF_SRCS_LINKED))
|
||
|
|
BPF_SKELS_LINKED := $(addprefix $(obj)/,$(LINKED_SKELS))
|
||
|
|
|
||
|
|
$(BPF_SKELS_LINKED): $(BPF_OBJS_LINKED) $(BPFTOOL)
|
||
|
|
@echo " BPF GEN-OBJ " $(@:.skel.h=)
|
||
|
|
$(Q)$(BPFTOOL) gen object $(@:.skel.h=.lbpf.o) $(addprefix $(obj)/,$($(@F)-deps))
|
||
|
|
@echo " BPF GEN-SKEL" $(@:.skel.h=)
|
||
|
|
$(Q)$(BPFTOOL) gen skeleton $(@:.skel.h=.lbpf.o) name $(notdir $(@:.skel.h=)) > $@
|
||
|
|
|
||
|
|
# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
|
||
|
|
# But, there is no easy way to fix it, so just exclude it since it is
|
||
|
|
# useless for BPF samples.
|
||
|
|
# below we use long chain of commands, clang | opt | llvm-dis | llc,
|
||
|
|
# to generate final object file. 'clang' compiles the source into IR
|
||
|
|
# with native target, e.g., x64, arm64, etc. 'opt' does bpf CORE IR builtin
|
||
|
|
# processing (llvm12) and IR optimizations. 'llvm-dis' converts
|
||
|
|
# 'opt' output to IR, and finally 'llc' generates bpf byte code.
|
||
|
|
$(obj)/%.o: $(src)/%.c
|
||
|
|
@echo " CLANG-bpf " $@
|
||
|
|
$(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \
|
||
|
|
-I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \
|
||
|
|
-I$(LIBBPF_INCLUDE) \
|
||
|
|
-D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
|
||
|
|
-D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \
|
||
|
|
-Wno-gnu-variable-sized-type-not-at-end \
|
||
|
|
-Wno-address-of-packed-member -Wno-tautological-compare \
|
||
|
|
-Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
|
||
|
|
-fno-asynchronous-unwind-tables \
|
||
|
|
-I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \
|
||
|
|
-O2 -emit-llvm -Xclang -disable-llvm-passes -c $< -o - | \
|
||
|
|
$(OPT) -O2 -mtriple=bpf-pc-linux | $(LLVM_DIS) | \
|
||
|
|
$(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
|
||
|
|
ifeq ($(DWARF2BTF),y)
|
||
|
|
$(BTF_PAHOLE) -J $@
|
||
|
|
endif
|